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Using MARC Sort to dedupe a file
The purpose of the MARC Sort utility is to order a file of MARC records by the value of any MARC Tag. In addition to this functionality, the utility can also process the results so that all duplicate records1) are written to one file, and all non-duplicate records are written to another file.
1)
By 'duplicate' we do not mean that two records are the same; instead, we mean two records or more that have sort keys that have evaluated to the same string after the sort options have been applied. For example, if you set TAG to 008 and SUBF to 007, then all records that have the same 008/Date1 will be considered duplicates:-).
